BYK ANTI-TERRA-250 is a high-performance, acidic polymeric alkylol ammonium salt wetting and dispersing additive designed for waterborne basecoats and filler slurries. It stabilizes pigments and fillers by controlling flocculation, forming three-dimensional "bridges" between particles to prevent flooding, floating, and settling. It is compatible with inorganic and organic pigments and enhances thixotropy while maintaining long-term stability in waterborne formulations.
Controlled Flocculation - Creates particle bridges to prevent pigment separation and settling
Universal Compatibility - Works with inorganic fillers (e.g., CaCO₃) and organic pigments
Thixotropy Enhancement - Improves anti-sagging properties without excessive viscosity buildup
Eco-Friendly - Water-based formulation with 70% active content, VOC-free
Process Stability - Maintains performance across pH variations (4-10)
Architectural Coatings - Exterior aqueous primers with anti-settling requirements
Industrial Fillers - High-load slurries for cement/fiber products (e.g., fiberboard coatings)
Wood Coatings - Water-based systems needing controlled pigment distribution
Printing Inks - Flexographic inks for packaging films requiring color consistency
Anti-Corrosive Primers - Direct-to-metal coatings with sedimentation resistance
| Chemical Base | Alkylolammonium salt of acidic polymer |
| Active Content | 70% (150°C/20min) |
| Density (20°C) | 1.07 g/ml |
| Amine Value | 41 mg KOH/g |
| Solvent System | Water |
| Storage Stability | months (unopened) |
Q1: What types of pigments is BYK ANTI-TERRA-250 especially effective for?
A: BYK ANTI-TERRA-250 is particularly effective for dispersing inorganic pigments such as iron oxides, titanium dioxide, and carbon black, as well as many organic pigments in solvent-based and high-solids coating systems.
Q2: Can BYK ANTI-TERRA-250 be used in waterborne systems?
A: No — BYK ANTI-TERRA-250 is specifically formulated for solvent-based and high-solids systems. It is not compatible with waterborne or aqueous dispersions due to its non-ionic, solvent-soluble molecular structure.
Q3: How does BYK ANTI-TERRA-250 improve dispersion stability?
A: It functions through steric stabilization, where its polymeric backbone anchors strongly onto pigment surfaces while the solvated side chains extend into the medium, preventing particle agglomeration and settling during storage and application.
Q4: Is pre-dilution required before adding BYK ANTI-TERRA-250 to a formulation?
A: Pre-dilution in a suitable solvent (e.g., xylene, mineral spirits, or esters) is recommended to ensure uniform incorporation and avoid localized high concentrations that could hinder optimal wetting and dispersion.
Q5: What is the typical dosage range for BYK ANTI-TERRA-250 in standard coatings formulations?
A: Dosage generally ranges from 0.1% to 2% by weight relative to pigment, depending on pigment type, loading level, and desired rheological and optical performance — optimization via lab-scale trials is advised.
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